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- c0abac29-bee6-44fc-802d-32b1b723f80c definition "The objective of the LEP experiment on Geotail is to observe plasma and energetic electrons and ions in the terrestrial magnetosphere and in the interplanetary medium. The LEP consists of three sensors: LEP-EA, LEP-SW, and LEP-MS, with common electronics (LEP-E). LEP-EA measures three-dimensional velocity distributions of hot plasma in the magnetosphere. EA consists of two nested sets of quadrispherical electrostatic analyzers. The inner analyzer measures electrons in the energy range from 6--36 eV, and the outer one measures positive ions from 7 eV/Q to 42 keV/Q. The field of view for each quadrispherical analyzer covers 10 degrees by 145 degrees, where the longer dimension is parallel to the satellite spin axis. LEP-SW measures three-dimensional velocity distributions of solar wind ions in the energy range from 0.1--8 keV/Q with a 270 degree spherical electrostatic analyzer with a field of view of 5 degrees by 60 degrees. LEP-MS is an energetic ion mass spectrometer, which provides three-dimensional determinations of the ion composition in 32 steps over the energy range of 0--25 keV/Q. All sensors operate continuously as long as the spacecraft power budget can allow, except for the orbit/attitude maneuvering operation. When spacecraft power budget is not sufficient to fully operate the instruments, priority is given to LEP-EA and LEP-E. Although this experiment ceased operation shortly after launch, the LEP-EA and LEP-SW portions of the experiment resumed operation in late 1993 and have worked well ever since. Principal Investigator: Dr. Tsugunobu Nagai Tokyo Institue of Technology Earth and Planetary Sciences Tokyo 152-8551 Japan Phone: Fax: e-mail: nagai@geo.titech.ac.jp See: http://pwg.gsfc.nasa.gov/geotail_inst.shtml Group: Instrument_Details Entry_ID: LEP Group: Instrument_Identification Instrument_Category: Solar/Space Observing Instruments Instrument_Class: Particle Detectors Short_Name: LEP Long_Name: Low Energy Particles (Geotail) End_Group Group: Associated_Platforms Short_Name: GEOTAIL End_Group Online_Resource: http://pwg.gsfc.nasa.gov/geotail_inst.shtml#LEP Group: Instrument_Logistics Instrument_Start_Date: 1992-07-24 Instrument_Owner: ISAS, Japan End_Group End_Group" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c id "1655458" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_id 02c354fd-8e2d-4825-b786-aa4b0782d1d6 @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_id 5f5e4f2c-61b7-4694-8680-3fc5799f6171 @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_id b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_label "Instruments" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_label "Particle Detectors" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c path_label "Solar/Space Observing Instruments" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c prefLabel "LEP" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c reference "" @default.
- c0abac29-bee6-44fc-802d-32b1b723f80c tag "Instruments" @default.